Ultra Definition

ŭltrə
adjective
Immoderately adhering to a belief, fashion, or course of action; extreme.
American Heritage
Going beyond the usual limit; excessive; extreme, esp. in opinions.
Webster's New World
Antonyms:
noun
An extremist, as in opinions held or policies favored.
Webster's New World
Wiktionary
An ultra-royalist in France.
Wiktionary

(usually capitalised) Code name used by British codebreakers during World War 2 for decrypted information gained from the enemy.

Wiktionary
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prefix
Beyond; on the other side of.
Ultraviolet.
American Heritage
Beyond the range, scope, or limit of.
Ultrasonic.
American Heritage
Far beyond the normal or proper degree of.
Ultraconservative.
American Heritage

Greater than normal quantity or importance, as in ultrasecret.

Wiktionary

Excessively, to an extreme, as in ultramicroscopic, ultra-careful.

Wiktionary
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Beyond, on the farther side of.
Ultramundane.
Webster's New World
Excessive or extreme.
An ultranationalist.
Webster's New World
Excessively; to an extreme degree.
An ultraromantic notion.
Webster's New World
Something excessive or extreme.
Ultraism.
Webster's New World
Beyond the range of.
Ultrasonic.
Webster's New World
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Other Word Forms of Ultra

Noun

Singular:
ultra
Plural:
ultras

Origin of Ultra

  • L < ultra, fem. of *ulter, beyond, on the other side of < IE *ol-, var. of base *al-, beyond > all, L alius, other

    From Webster's New World College Dictionary, 5th Edition

  • Latin ultrā- from ultrā beyond al-1 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Borrowing from Latin ultrā ("beyond").

    From Wiktionary

  • French from Latin ultrā- ultra-

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin ultra.

    From Wiktionary

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